Old product with new tag

I bought an Olay bodywash from spencer.When I started using that I found there is another tag with lower price just below the current tag.But the main concern is the hidden tag seems to be so old and the import month is different.On the current tag it is written as APR 2015(I bought that on 1st week of may).Seems to be then done this to clear the stock.If they are doing this with skin product then whom can we trust.